Multimodal coherent anti-Stokes Raman spectroscopic imaging with a fiber optical parametric oscillator

We report on multimodal coherent anti-Stokes Raman scattering (CARS) imaging with a source composed of a femtosecond fiber laser and a photonic crystal fiber (PCF)-based optical parametric oscillator (FOPO). By switching between two PCFs with different zero dispersion wavelengths, a tunable signal beam from the FOPO covering the range from 840 to 930 nm was produced. By combining the femtosecond fiber laser and the FOPO output, simultaneous CARS imaging of a myelin sheath and two-photon excitation fluorescence imaging of a labeled axons in rat spinal cord have been demonstrated at the speed of 20 μs per pixel.     

Enhancement of gas sensing properties of CdS nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation

CdS nanowire/ZnO nanosphere materials (CdS/ZnO) with hierarchical structure were synthesized by a three-step solvothermal process. XRD, FESEM and TEM analysis confirmed the growth of ZnO nanospheres on the surface of CdS nanowires (NWs). The transient photovoltage (TPV) measurements revealed that the interface between CdS and ZnO can inhibit the recombination of photogenerated excess carriers and prolong the lifetime of excess carriers in CdS/ZnO materials. Moreover, the CdS/ZnO materials exhibit a dramatic improvement in optoelectronic performance and visible-light-irradiation gas sensing activity, which gave 1 order of magnitude larger than that of CdS NWs in response to formaldehyde. The enhancement of sensing properties is attributed to the interfacial transport of excess carriers.     

Study on NIR optical rewritable film based on dithienylethene and upconversion nanocrystals

Tm3+ and Yb3+ codoped NaYF4 upconversion (UC) nanoparticles (NPs) with intense ultraviolet (UV) fluorescence were synthesized using a solvothermal approach. NIR optical rewritable film incorporated with the UCNPs and dithienylethene (DTE) were performed for optical storage based on the photochromic reaction of DTE induced by the intense UV from themultiphoton UC fluorescence of NaYF4NPs. The photochromic DTE did not exhibit obvious fatigue after repetitious write/erase cycles using NIR/green irradiation.     

塑料瓶贴标用乳液胶的研究

本文分析了塑料瓶的表面结构特性及其对贴标胶的要求，简介乳液胶的合成过程，讨论了聚会温度、搅拌速度、增粘剂和改性剂对贴标胶的影响。     

冷却机机头大直径法兰的焊接工艺

通过对不锈钢大直径法兰焊接过程中出现的裂纹及变形进行分析,提出了防止焊缝裂纹及焊接变形的工艺措施。     

蒙太尔进入日本聚丙烯制造业及思考

世界最大的聚丙烯生产厂蒙太尔公司以组建合资公司的形式进入日本聚丙烯制造业,受到亚洲聚丙烯业界的关注,本文浅析这一国际间的合并重组面临的问题及可能采取的发展战略,并对我国聚丙烯产业发展提出建议。     

耐腐蚀橡胶衬里在10万吨/年离子膜烧碱设备中的应用

本文离子膜烧碱介绍了离子膜烧碱中耐腐蚀橡胶衬里设备的设计、制造、检验及应用。     

环氧化SBS胶粘剂的研制

研究了环氧化SBS橡胶胶粘剂的合成及应用。试验结果表明环氧化SBS胶粘剂在粘接极性材料时的性能要优于SBS胶粘剂。     

有机硅密封胶粘附性能的改善

研究了交联剂、催化剂、填料等对单组分有机硅密封胶性能的影响。     

原位复合TiN/O'-sialon在空气中的氧化行为

通过对不同气孔率和TiN含量的原位复合TiN/O′-sialon材料在空气中的氧化行为研究 ,得出了不同材料在不同温度下的氧化结果 ,提出了不同材料在不同温度下的氧化机理和模型 .